Method for patterning mesoporous inorganic oxide film, and electric device including mesoporous inorganic oxide film patterned by the same

1. A method for producing a photoelectrode, the method comprising: forming a mesoporous inorganic oxide layer on a conductive substrate using a composition containing neutral mesoporous inorganic oxide particles; forming a pattern on the mesoporous inorganic oxide layer using an elastic stamp for pattern formation; adsorbing a dye to the mesoporous inorganic oxide layer on which the pattern is formed and injecting a hole transfer material into the mesoporous inorganic oxide layer in which the dye is adsorbed.

2. The method for producing a photoelectrode according to claim 1 , wherein the inorganic oxide is an oxide containing a metal element selected from the group consisting of titanium (Ti), zinc (Zn), niobium (Nb), tungsten (W), zirconium (Zr), strontium (Sr), indium (In), lanthanum (La), vanadium (V), molybdenum (Mo), tin (Sn), magnesium (Mg), aluminum (Al), yttrium (Y), scandium (Sc), samarium (Sm), gallium (Ga), and combinations thereof.

3. The method for producing a photoelectrode according to claim 1 , wherein the inorganic oxide particles have a particle size of 2 nm to 60 μm.

4. The method for producing a photoelectrode according to claim 1 , wherein the elastic stamp for pattern formation is a stamp made of a material selected from the group consisting of polydimethylsiloxane, silicone rubber, polyethylene terephthalate, polycarbonate, polyimide, polyethylene, polymethyl methacrylate, polystyrene, polylactic-co-glycolic acid, hydrogel, and mixtures thereof.

5. The method for producing a photoelectrode according to claim 1 , further comprising forming an interface adhesive layer on a conductive substrate using a composition containing a precursor of the inorganic oxide, before the process of forming a mesoporous inorganic oxide layer.

6. The method for producing a photoelectrode according to claim 1 , wherein the pattern formation is carried out by forming a pattern on the mesoporous inorganic oxide layer using an elastic stamp for pattern formation, and then calcining the mesoporous inorganic oxide layer.

7. The method for producing a photoelectrode according to claim 1 , wherein the injection of a hole transfer material involves a process of allowing a composition containing a monomer of an electroconductive polymer for forming a hole transfer material to penetrate into the patterned inorganic oxide layer, and then thermally polymerizing the monomer to form an electroconductive polymer for hole transfer material.

8. The method for producing a photoelectrode according to claim 1 , further comprising injecting an additive containing a non-volatile ionic liquid and an ion salt, after the injection of a hole transfer material.